Multi-centre interventional cross-sectional prevalence study Assessment of the Rosacea Prevalence in the General Population.

Primary objective:

Assessment of the prevalence of rosacea in the general population per country using subject questionnaire and dermatologist diagnosis

Part I

Inclusion Criteria:

The following subjects will be included in the study:

• Subjects aged 18 to 65 years old from the general population
• Subjects who are willing to complete the questionnaires

Part II

Inclusion Criteria:

The following subjects will be included in Part II of the study:

• Subjects who screened positive for rosacea during the first part of the study and selected by random method
• Subjects who gave their informed consent to participate in Part II of the study

Part I:

Subjects will be screened from the general population by questionnaires mainly focusing on detection of signs and symptoms of rosacea.

Subjects' answers will be submitted to a pre-defined algorithm to identify the potential subjects with rosacea (screened positive for rosacea, Screened R+).

Part II:

A subgroup of subjects (100 maximum per country) will be randomly selected among those who screened positive for rosacea and will be referred to the closest investigational site (dermatologist practice).